The Effect of Initial Cooling Temperature on Deformation of U75V Heavy Rail after Cooling

The initial cooling temperature has important effect on the bending change and section size of rolled heavy rail, when rolled heavy rail is on the cooling bed for natural cooling. In the paper, the heat-stress couple method is adopted to carry on numerical simulation to cooling process of 60kg/m U75V heavy rail, and we has obtained the bending change value and section size of rolled heavy rail in different initial cooling temperature. The study is of great reference value on the design of cooling bed which is for hundred-meter high speed heavy rail and the formulation of cooling technological parameters.

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The Deformation Rule of the Cooled U75V Heavy Rail Caused by the Different Heat Transfer Coefficient

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.299-300.1005 ◽

2011 ◽

Vol 299-300 ◽

pp. 1005-1011 ◽

Cited By ~ 2

Author(s):

Ming Xin Gao ◽

Pei Long Wang ◽

Hao Jia ◽

Shan Hu Tong ◽

Hua Song ◽

...

Keyword(s):

Heat Transfer ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

High Speed ◽

Reference Value ◽

Ansys Software ◽

Cooling Process ◽

Technological Parameters ◽

The Heat Transfer Coefficient ◽

Heavy Rail

When rolled heavy rail is on the cooling bed for natural cooling, the heat transfer coefficient has important effect on the bending and section sizes of cooled heavy rail. In the paper, the heat-stress couple module ofANSYS software is adopted to carry on numerical simulation on the cooling process of 60kg/m U75V heavy rail, and we obtain the change rule that heat transfer coefficient has effect on bending curvature and section sizes of cooled heavy rail. This study is of great reference value on cooling bed design and the formulation of cooling technological parameters for high speed heavy rail.

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Bending Deformation of U75V Heavy Rail through Natural Cooling Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.190-191.1244 ◽

2012 ◽

Vol 190-191 ◽

pp. 1244-1248

Author(s):

Hua Song ◽

Shan Hu Tong ◽

Juan Juan Jiang ◽

Hao Jia ◽

Si Yu Yuan ◽

...

Keyword(s):

High Speed ◽

Theoretical Foundation ◽

Reference Value ◽

The Finite Element Method ◽

Cooling Process ◽

Bending Deformation ◽

Technical Parameters ◽

Chain Transmission ◽

Heavy Rail ◽

Cooling Model

The cooling process of heavy rail is the important step to the output, that the preflexed rail is cooled on the stepping-type cold bed which has been carried by the chain transmission device. We employed the finite element method to analyze the bending deformation of the U75V rail through natural cooling process, the effected factors including the rail side-laying on the cold bed, the latent heat of phase change, and the thermal radiation are considered in the analysis. In the paper, we discussed the establishment of the heavy rail cooling model, the cooling parameters and the boundary condition, and emphatically analyzed the rail bending deformation changes and its principles through the cooling process. The study of the hundred-meter high speed heavy rail can provide the theoretical foundation and reference value to the formulation of cooling technical parameters and preflex technical schedule.

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Numerical Analysis and Simulation of the Straightening Process of Heavy Rails on a Horizontal Roller-Straightening Machine

Materials Science Forum ◽

10.4028/www.scientific.net/msf.946.775 ◽

2019 ◽

Vol 946 ◽

pp. 775-781

Author(s):

E.V. Timakov ◽

F.S. Dubinskiy

Keyword(s):

Numerical Simulation ◽

Numerical Analysis ◽

Hot Rolling ◽

Input Data ◽

Experimental Tests ◽

Cooling Process ◽

Horizontal Roller ◽

Initial Camber ◽

Heavy Rail

In this paper, the ABAQUS is adopted to carry on numerical simulation on straightening process of R65 heavy rail. The straightening process has been simulated here using the FE package of ABAQUS. All the input data were extracted from experimental tests according to tail manufacturing. Moreover, initial camber of the rail was measured after hot rolling and cooling process.

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The Numerical Simulation of Horizontal Straightening for 60 kg/m Heavy Rail with Original Curvature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.16-19.44 ◽

2009 ◽

Vol 16-19 ◽

pp. 44-48 ◽

Cited By ~ 2

Author(s):

Hua Song ◽

Li Hua Fu ◽

Pei Long Wang ◽

De Xin Ding ◽

Hui Li

Keyword(s):

Numerical Simulation ◽

Residual Stress ◽

Dynamic Simulation ◽

Reference Value ◽

Fem Model ◽

Simulation Process ◽

Explicit Dynamics ◽

Horizontal Roller ◽

Heavy Rail

It has established the FEM model of nine horizontal roller straightening with original curvature for 60㎏/m heavy rail by using explicit dynamics software ANSYS/LS-DYNA in the paper, and it carried out the dynamic simulation process of the nine horizontal roller straightening, analyzed the stress changing rules of heavy rail in the seven deformation zones during the straightening process , even studied the value and distributive condition of residual stress after straightening, disclosed the mechanism of the residual stress in the heavy rail straightening process, and the paper is a guidance to improve heavy rail quality in straightening craft. It has the reference value to the design of heavy rail straightening machine and the formulation of the straightening regulations.

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Study on the Temperature Field of U75V Rail in the Cooling Process Based on ANSYS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.300-301.1099 ◽

2013 ◽

Vol 300-301 ◽

pp. 1099-1109

Author(s):

Hao Jia ◽

Si Yu Yuan ◽

He Liu ◽

Shan Hu Tong ◽

Li Hua Fu ◽

...

Keyword(s):

Phase Transition ◽

Temperature Field ◽

Three Dimensional ◽

Advisory Opinion ◽

Cooling Process ◽

Technological Parameters ◽

Element Analysis ◽

Distribution Rules ◽

Three Dimensional Models ◽

Heavy Rail

Uneven distribution of temperature is one of the important factors which influences heavy rail bending changes during the cooling process. Through the research of temperature field can reasonable analysis the heavy rail bending change rule, so it is necessary to study the temperature change rule during heavy rail cooling process. This paper adopts finite element analysis software ANSYS to set up three-dimensional models of U75V heavy rail and the cooling bed, and numerical simulate the cooling process. In which, it is studied the temperature changing rules and its distribution rules, emphatically analyzed temperature changing rule during the phase transition phase, and got the temperature changing rules and distribution rules in final cooling time. Especially, it is considered that the heavy rail placed on its side, the latent heat of phase transition and thermal radiation. This research can provide the theory basis and the advisory opinion on the formulation of cooling technological parameters and preflex regulations of the rail.

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Drift-Diffusion Simulation of High-Speed Optoelectronic Devices

Electronics ◽

10.3390/electronics8010106 ◽

2019 ◽

Vol 8 (1) ◽

pp. 106 ◽

Cited By ~ 5

Author(s):

Ivan Pisarenko ◽

Eugeny Ryndin

Keyword(s):

Numerical Simulation ◽

Integrated Circuits ◽

High Speed ◽

Carrier Transport ◽

Optoelectronic Devices ◽

Analytical Models ◽

Technological Parameters ◽

Drift Diffusion ◽

Construction Methods ◽

Applied Software

In this paper, we address the problem of research and development of the advanced optoelectronic devices designed for on-chip optical interconnections in integrated circuits. The development of the models, techniques, and applied software for the numerical simulation of carrier transport and accumulation in high-speed AIIIBV (A and B refer to group III and V semiconductors, respectively) optoelectronic devices is the purpose of the paper. We propose the model based on the standard drift-diffusion equations, rate equation for photons in an injection laser, and complex analytical models of carrier mobility, generation, and recombination. To solve the basic equations of the model, we developed the explicit and implicit techniques of drift-diffusion numerical simulation and applied software. These aids are suitable for the stationary and time-domain simulation of injection lasers and photodetectors with various electrophysical, constructive, and technological parameters at different control actions. We applied the model for the simulation of the lasers with functionally integrated amplitude and frequency modulators and uni-travelling-carrier photodetectors. According to the results of non-stationary simulation, it is reasonable to optimize the parameters of the lasers-modulators and develop new construction methods aimed at the improvement of photodetectors’ response time.

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